When you're watching The Little Mermaid and see how fast Eric & Ariel fall in love (it was like love at first sight. They hadn't even talked to each other yet.) And you think to yourself, wow that was fast. Even faster than Edward & Bella (including the movie.) At least they knew each other for a while and talked to each other before they fell in love.

You have a very pale substitute at school, and you think of all the things she's doing that make you SURE she is a vampire. (She appeared on the other side of the cafeteria, when she was talking to someone, she gulped and walked away, her eyes were black, it was raining outside.)